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-rw-r--r--sunrpc/key_call.c200
1 files changed, 176 insertions, 24 deletions
diff --git a/sunrpc/key_call.c b/sunrpc/key_call.c
index e59a8b7..0219eaf 100644
--- a/sunrpc/key_call.c
+++ b/sunrpc/key_call.c
@@ -38,6 +38,7 @@
#include <stdio.h>
#include <errno.h>
+#include <fcntl.h>
#include <signal.h>
#include <unistd.h>
#include <string.h>
@@ -47,6 +48,7 @@
#include <sys/param.h>
#include <sys/socket.h>
#include <rpc/key_prot.h>
+#include <bits/libc-lock.h>
#define KEY_TIMEOUT 5 /* per-try timeout in seconds */
#define KEY_NRETRY 12 /* number of retries */
@@ -268,8 +270,8 @@ des_block *(*__key_gendes_LOCAL) (uid_t, char *) = 0;
static int
internal_function
-key_call (u_long proc, xdrproc_t xdr_arg, char *arg,
- xdrproc_t xdr_rslt, char *rslt)
+key_call_keyenvoy (u_long proc, xdrproc_t xdr_arg, char *arg,
+ xdrproc_t xdr_rslt, char *rslt)
{
XDR xdrargs;
XDR xdrrslt;
@@ -283,28 +285,6 @@ key_call (u_long proc, xdrproc_t xdr_arg, char *arg,
uid_t euid;
static char MESSENGER[] = "/usr/etc/keyenvoy";
- if (proc == KEY_ENCRYPT_PK && __key_encryptsession_pk_LOCAL)
- {
- cryptkeyres *res;
- res = (*__key_encryptsession_pk_LOCAL) (__geteuid (), arg);
- *(cryptkeyres *) rslt = *res;
- return 1;
- }
- else if (proc == KEY_DECRYPT_PK && __key_decryptsession_pk_LOCAL)
- {
- cryptkeyres *res;
- res = (*__key_decryptsession_pk_LOCAL) (__geteuid (), arg);
- *(cryptkeyres *) rslt = *res;
- return 1;
- }
- else if (proc == KEY_GEN && __key_gendes_LOCAL)
- {
- des_block *res;
- res = (*__key_gendes_LOCAL) (__geteuid (), 0);
- *(des_block *) rslt = *res;
- return 1;
- }
-
success = 1;
sigemptyset (&mask);
sigaddset (&mask, SIGCHLD);
@@ -365,3 +345,175 @@ key_call (u_long proc, xdrproc_t xdr_arg, char *arg,
return success;
}
+
+struct key_call_private {
+ CLIENT *client; /* Client handle */
+ pid_t pid; /* process-id at moment of creation */
+ uid_t uid; /* user-id at last authorization */
+};
+static struct key_call_private *key_call_private_main = NULL;
+__libc_lock_define_initialized (static, keycall_lock)
+
+/*
+ * Keep the handle cached. This call may be made quite often.
+ */
+static CLIENT *
+getkeyserv_handle (int vers)
+{
+ struct key_call_private *kcp = key_call_private_main;
+ struct timeval wait_time;
+ int fd;
+ struct sockaddr_un name;
+ int namelen = sizeof(struct sockaddr_un);
+
+#define TOTAL_TIMEOUT 30 /* total timeout talking to keyserver */
+#define TOTAL_TRIES 5 /* Number of tries */
+
+ if (kcp == (struct key_call_private *)NULL)
+ {
+ kcp = (struct key_call_private *)malloc (sizeof (*kcp));
+ if (kcp == (struct key_call_private *)NULL)
+ return (CLIENT *) NULL;
+
+ key_call_private_main = kcp;
+ kcp->client = NULL;
+ }
+
+ /* if pid has changed, destroy client and rebuild */
+ if (kcp->client != NULL && kcp->pid != __getpid ())
+ {
+ clnt_destroy (kcp->client);
+ kcp->client = NULL;
+ }
+
+ if (kcp->client != NULL)
+ {
+ /* if other side closed socket, build handle again */
+ clnt_control (kcp->client, CLGET_FD, (char *)&fd);
+ if (getpeername (fd,(struct sockaddr *)&name,&namelen) == -1)
+ {
+ auth_destroy (kcp->client->cl_auth);
+ clnt_destroy (kcp->client);
+ kcp->client = NULL;
+ }
+ }
+
+ if (kcp->client != NULL)
+ {
+ /* if uid has changed, build client handle again */
+ if (kcp->uid != __geteuid ())
+ {
+ kcp->uid = __geteuid ();
+ auth_destroy (kcp->client->cl_auth);
+ kcp->client->cl_auth =
+ authunix_create ((char *)"", kcp->uid, 0, 0, NULL);
+ if (kcp->client->cl_auth == NULL)
+ {
+ clnt_destroy (kcp->client);
+ kcp->client = NULL;
+ return ((CLIENT *) NULL);
+ }
+ }
+ /* Change the version number to the new one */
+ clnt_control (kcp->client, CLSET_VERS, (void *)&vers);
+ return kcp->client;
+ }
+
+ if ((kcp->client == (CLIENT *) NULL))
+ /* Use the AF_UNIX transport */
+ kcp->client = clnt_create ("/var/run/keyservsock", KEY_PROG, vers, "unix");
+
+ if (kcp->client == (CLIENT *) NULL)
+ return (CLIENT *) NULL;
+
+ kcp->uid = __geteuid ();
+ kcp->pid = __getpid ();
+ kcp->client->cl_auth = authunix_create ((char *)"", kcp->uid, 0, 0, NULL);
+ if (kcp->client->cl_auth == NULL)
+ {
+ clnt_destroy (kcp->client);
+ kcp->client = NULL;
+ return (CLIENT *) NULL;
+ }
+
+ wait_time.tv_sec = TOTAL_TIMEOUT/TOTAL_TRIES;
+ wait_time.tv_usec = 0;
+ clnt_control (kcp->client, CLSET_RETRY_TIMEOUT,
+ (char *)&wait_time);
+ if (clnt_control (kcp->client, CLGET_FD, (char *)&fd))
+ fcntl (fd, F_SETFD, 1); /* make it "close on exec" */
+
+ return kcp->client;
+}
+
+/* returns 0 on failure, 1 on success */
+static int
+internal_function
+key_call_socket (u_long proc, xdrproc_t xdr_arg, char *arg,
+ xdrproc_t xdr_rslt, char *rslt)
+{
+ CLIENT *clnt;
+ struct timeval wait_time;
+ int result = 0;
+
+ __libc_lock_lock (keycall_lock);
+ if ((proc == KEY_ENCRYPT_PK) || (proc == KEY_DECRYPT_PK) ||
+ (proc == KEY_NET_GET) || (proc == KEY_NET_PUT) ||
+ (proc == KEY_GET_CONV))
+ clnt = getkeyserv_handle(2); /* talk to version 2 */
+ else
+ clnt = getkeyserv_handle(1); /* talk to version 1 */
+
+ if (clnt != NULL)
+ {
+ wait_time.tv_sec = TOTAL_TIMEOUT;
+ wait_time.tv_usec = 0;
+
+ if (clnt_call (clnt, proc, xdr_arg, arg, xdr_rslt, rslt,
+ wait_time) == RPC_SUCCESS)
+ result = 1;
+ }
+
+ __libc_lock_unlock (keycall_lock);
+
+ return result;
+}
+
+/* returns 0 on failure, 1 on success */
+static int
+internal_function
+key_call (u_long proc, xdrproc_t xdr_arg, char *arg,
+ xdrproc_t xdr_rslt, char *rslt)
+{
+ static int use_keyenvoy = 0;
+
+ if (proc == KEY_ENCRYPT_PK && __key_encryptsession_pk_LOCAL)
+ {
+ cryptkeyres *res;
+ res = (*__key_encryptsession_pk_LOCAL) (__geteuid (), arg);
+ *(cryptkeyres *) rslt = *res;
+ return 1;
+ }
+ else if (proc == KEY_DECRYPT_PK && __key_decryptsession_pk_LOCAL)
+ {
+ cryptkeyres *res;
+ res = (*__key_decryptsession_pk_LOCAL) (__geteuid (), arg);
+ *(cryptkeyres *) rslt = *res;
+ return 1;
+ }
+ else if (proc == KEY_GEN && __key_gendes_LOCAL)
+ {
+ des_block *res;
+ res = (*__key_gendes_LOCAL) (__geteuid (), 0);
+ *(des_block *) rslt = *res;
+ return 1;
+ }
+
+ if (!use_keyenvoy)
+ {
+ if (key_call_socket (proc, xdr_arg, arg, xdr_rslt, rslt))
+ return 1;
+ use_keyenvoy = 1;
+ }
+ return key_call_keyenvoy (proc, xdr_arg, arg, xdr_rslt, rslt);
+}
generated by cgit v1.1 at 2024-12-02 16:25:46 +0000